soft layer in red beds

a protective layer in excavation of rock foundation

additional low layer functions

asphalt top layer solution

bedding fault zone in layer C5

concrete in layer

congenital defect of muscular layer in stomach wall

Double Layer Soft Soil

hard layer

layer in latter period

low layer jet and energy front

low resistivity layer in the crust

low resistivity layer in upper mantle

Low velocity layer in mid-crust

low-velocity-and-high-conduction layer in mid-crust

penetrative soil layer in field in situ

Putaohua oil layer in Yushulin

sandstone layer in the uranium-coal bearing series

sandwiched hard layer